Aaryn Gries Prom Pics -- Some of My Best Dates Are Black

"Big Brother" contestant Aaryn Gries has taken lots of heat for her racist comments on the show ... but we have color photos showing a more tolerant side.

We got pics of Aaryn's big prom night in 2009, when she was a senior at Douglas County High School in Castle Rock, Colorado. Her prom date -- clearly visible in the photo -- is Mike Miller. Mike -- who is BLACK -- was a starting tight end on the football team.

Mike tells TMZ Aaryn -- whom he dated for a few months -- makes bad jokes sometimes, but not "prejudiced or hateful." He calls her sense of humor "smart-ass."

Who knew ... she had a little black in her.